Hi there!
a)
[tex]2x + 8 = x + 25 + 8[/tex]
Collect terms
[tex]2x + 8 = x + 33[/tex]
Subtract x
[tex]x + 8 = 33[/tex]
Subtract 8
[tex]x = 25[/tex]
b)
[tex]3x + 23 = 2x + 59[/tex]
Subtract 2x
[tex]x + 23 = 59[/tex]
Subtract 23
[tex]x = 26[/tex]
c)
[tex]5 + 12 = 17[/tex]
This is not an equation, but the sum of 5 and 12 is 17, so it's true.
d)
[tex]2x - 4 = x + 9[/tex]
Subtract x
[tex]x - 4 = 9[/tex]
Add 4.
[tex]x = 13[/tex]
e)
[tex]5x - 10 = 4x - 12[/tex]
Subtract 4x
[tex]x - 10 = - 12[/tex]
Add 10
[tex]x = - 2[/tex]
